senator marco rubio, republican of florida, had a line about foreign policy saying the key is making sure you're not trying to do more than we can, while also ensuring we are not doing less than we should. rubio rattled off the hot spots in the mideast and kerry offered the this response. >> there's a monumental transformation taking place. this this biggest upheaval in that part of the world since the ottoman empire. since it came apart. it is a highly sectarian, divided, tribal part of the world. and i'm not sure that every policy has always been sensible on that. >> kerry said we'll do what we must to keep iran from getting nuclear weapons. shep? >> a really ugly problem is syria. what about that? >> senator kerry said there was a moment when the syrian regime was reaching out to the west, but the moment is gone. and then there was this exchange. >> every day that goes by in syria, it gets worse. every day that goes by it gets worse. so, there is a -- seems to me, a very strong elm tuesday -- empetus to realize our present policy is not working and consider other option. >> mccain